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SICE 2003 Annual Conference

作者： Murayama, N Kawata, S Oguchi, T Tokyo Metropolitan Univ Tokyo 158 Japan

ISBN: (纸本)0780383524

In this paper, we propose a new method of parallel and distributed simulation (PADS) for Scene Transition Nets. Scene Transition Net(STN) is a discrete/continuous hybrid system model which was developed by one of the authors. To realize PADS for STNs, we extend the definition of STN. Furthermore, a new distributed STN simulator is developed.

关键词： discrete event system hybrid system parallel and distributed simulation

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Adaptive parallel and distributed simulation of complex networks

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JOURNAL OF parallel AND distributed COMPUTING 2022年 163卷 30-44页

作者： D'Angelo, Gabriele Ferretti, Stefano Univ Bologna Dept Comp Sci & Engn Bologna Italy Univ Urbino Carlo Bo Dept Pure & Appl Sci Urbino Italy

Complex networks are an important methodology to model several (if not all) aspects of the real world, in which multiple entities interact, in some way. While many aspects related to such interactions can be investigated by looking at the general mathematical metrics of the networks, an alternative approach lies in the simulation of some application protocol on top of (large scale) complex networks. In this paper, we present a study on this intricate problem. The complexity of the simulation is due to the need to model all the interactions among network nodes. We focus on discrete-event simulation, a simulation methodology that enables both sequential (i.e. monolithic) and parallel and distributed simulation (i.e. PADS) approaches. We discuss the performance and scalability requirements that the simulator should have. We also introduce a case study based on the agent-based simulation of gossip dissemination on top of a complex network. To demonstrate the viability of this simulation technique, we focus on a tool we built to simulate complex networks. The tool exploits adaptive partitioning mechanisms, which are essential to reduce the communication overhead in the PADS. An experimental evaluation has been conducted using different network topologies and simulator setups. Results demonstrate the feasibility of the approach to simulate complex networks. (C) 2022 Elsevier Inc. All rights reserved.

关键词： simulation Complex networks parallel and distributed simulation

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MoVES: A framework for parallel and distributed simulation of wireless vehicular ad hoc networks

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COMPUTER NETWORKS 2008年第1期52卷 155-179页

作者： Bononi, Luciano Di Felice, Marco D'Angelo, Gabriele Bracuto, Michele Donatiello, Lorenzo Univ Bologna Dept Comp Sci I-40127 Bologna Italy

In this paper, we illustrate a Mobile Wireless Vehicular Environment simulation (MoVES) framework for the parallel and distributed simulation of vehicular wireless ad hoc networks (VANETs). The proposed framework supports extensible, module-based and layered modeling, and scalable, accurate and efficient simulation of vehicular scenarios integrated with wireless communication and mobile services/applications. The vehicular layer includes models for vehicles, synthetic and trace-driven mobility, driver behavior, GPS-based street maps, intersection policies and traffic lights. The wireless communication layer currently includes models for physical propagation, and a network protocol stack including IEEE 802.11 Medium Access Control, up to the Application layer. MoVES provides a platform for microscopic modeling and simulation-based analysis of wireless vehicular scenarios and communication-based services and applications, like Intelligent Transportation Systems, communication-based monitoring/control and info-mobility services. The framework includes design solutions for scalable, accurate and efficient parallel and distributed simulation of complex, vehicular communication scenarios executed over cost-effective, commercial-off-the-shelf (COTS) simulation architectures. Dynamic model partition and adaptation-based load balancing solutions have been designed by exploiting common assumptions and model characteristics, in a user-transparent way. Test-bed performance evaluation for realistic scenarios has shown the effectiveness of MoVES in terms of simulation efficiency, scalability, adaptation and simulation accuracy. (C) 2007 Elsevier B.V. All rights reserved.

关键词： wireless vehicular ad hoc networks parallel and distributed simulation intelligent transportation systems mobile services mobile communication

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Fault tolerant adaptive parallel and distributed simulation through functional replication

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simulation MODELLING PRACTICE AND THEORY 2019年 93卷 192-207页

作者： D'Angelo, Gabriele Ferretti, Stefano Marzolla, Moreno Univ Bologna Dept Comp Sci & Engn Mura Anteo Zamboni 7 I-40127 Bologna Italy

This paper presents FT-GAIA, a software-based fault-tolerant parallel and distributed simulation middleware. FT-GAIA has being designed to reliably handle parallel and distributed simulation (PADS) models, which are needed to properly simulate and analyze complex systems arising in any kind of scientific or engineering field. PADS takes advantage of multiple execution units run in multicore processors, cluster of workstations or HPC systems. However, large computing systems, such as HPC systems that include hundreds of thousands of computing nodes, have to handle frequent failures of some components. To cope with this issue, FT-GAIA transparently replicates simulation entities and distributes them on multiple execution nodes. This allows the simulation to tolerate crash-failures of computing nodes. Moreover, FT-GAIA offers some protection against Byzantine failures, since interaction messages among the simulated entities are replicated as well, so that the receiving entity can identify and discard corrupted messages. Results from an analytical model and from an experimental evaluation show that FT-GAIA provides a high degree of fault tolerance, at the cost of a moderate increase in the computational load of the execution units.

关键词： simulation parallel and distributed simulation Fault tolerance Adaptive systems Middleware Agent-based simulation

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A space-time object model - An object oriented model for parallel and distributed simulation

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IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS 2000年第4期E83D卷 815-823页

作者： Furuichi, M Ozaki, A Abe, K Nakajima, K Tanaka, H Mitsubishi Elect Co Informat Technol R&D Ctr Kamakura Kanagawa 2478591 Japan Mitsubishi Elect Co Adv Technol R&D Ctr Amagasaki Hyogo 6618661 Japan

This paper proposes a Space-Time Object Model, an object oriented model that possesses space and time management mechanisms. The goal of this object model is to provide a common software infrastructure for implementing large-scale moving object simulations efficiently, such as car traffic simulations and disaster evacuation simulations, using a direct mapping scheme on a parallel and distributed computing environment. In this object model, the software infrastructure provides two principal functions, "Space Management" and "Time Management," which allows programmers to focus on application programming instead of parallel programming. Although there are several known infrastructure software, which provide the environment needed to develop and execute parallel and distributed simulations, they only provide a "Time Management" mechanism. In this paper, we present a Space-Time Object Model and an overview of a program called OSim, which is an implementation of the Space-Time Object Model. Then, we demonstrate the applicability and efficiency of this model by introducing the overview and evaluation results of a parallel car traffic simulation system using OSim.

关键词： parallel and distributed simulation object oriented simulation time warp breathing space time

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New trends in parallel and distributed simulation: From many-cores to Cloud Computing

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simulation MODELLING PRACTICE AND THEORY 2014年 49卷 320-335页

作者： D'Angelo, Gabriele Marzolla, Moreno Univ Bologna Dept Comp Sci & Engn I-40127 Bologna Italy

Recent advances in computing architectures and networking are bringing parallel computing systems to the masses so increasing the number of potential users of these kinds of systems. In particular, two important technological evolutions are happening at the ends of the computing spectrum: at the "small'' scale, processors now include an increasing number of independent execution units (cores), at the point that a mere CPU can be considered a parallel shared-memory computer;at the "large'' scale, the Cloud Computing paradigm allows applications to scale by offering resources from a large pool on a pay-as-you-go model. Multi-core processors and Clouds both require applications to be suitably modified to take advantage of the features they provide. Despite laying at the extreme of the computing architecture spectrum - multi-core processors being at the small scale, and Clouds being at the large scale - they share an important common trait: both are specific forms of parallel/distributed architectures. As such, they present to the developers well known problems of synchronization, communication, workload distribution, and so on. Is parallel and distributed simulation ready for these challenges? In this paper, we analyze the state of the art of parallel and distributed simulation techniques, and assess their applicability to multi-core architectures or Clouds. It turns out that most of the current approaches exhibit limitations in terms of usability and adaptivity which may hinder their application to these new computing architectures. We propose an adaptive simulation mechanism, based on the multi-agent system paradigm, to partially address some of those limitations. While it is unlikely that a single approach will work well on both settings above, we argue that the proposed adaptive mechanism has useful features which make it attractive both in a multi-core processor and in a Cloud system. These features include the ability to reduce communication costs by migrating si

关键词： simulation parallel and distributed simulation Cloud Computing Adaptive systems Middleware Agent-based simulation

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Design and Analysis of a Minimum Time Buckets Synchronization Algorithm for parallel and distributed simulation 13

Design and Analysis of a Minimum Time Buckets Synchronizatio...

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13th IEEE International Symposium on Autonomous Decentralized System (ISADS)

作者： Wang, Xuehui Zhang, Lei Natl Univ Def Technol Sch Comp State Key Lab High Performance Comp Changsha Hunan Peoples R China

ISBN: (纸本)9781509040421

Time synchronization is critical for parallel and distributed simulation (PADS). In this paper we first compare the two main synchronization mechanisms in PADS, namely conservative and optimistic protocols. Then we propose a Minimum Time Buckets synchronization algorithm, which can optimistically schedule events without sending anti-messages. Comparing to the well-known Breathing Time Bucket (MTB) synchronization algorithm, our algorithm reduces the waiting time and rollback probability for logical processes, yet it commits the same number of events in each time advance interval. Experiment results show that the MTB algorithm can effectively decrease the rollback rate, reduce the execution time, and achieve a higher speed up.

关键词： parallel and distributed simulation synchronization mechanism minimum time bucket algorithm event horizon performance experiment

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A GENERIC METHODOLOGY TO DEVS parallel and distributed simulation

A GENERIC METHODOLOGY TO DEVS PARALLEL AND DISTRIBUTED SIMUL...

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25th European simulation and Modelling Conference (ESM 2011)

作者： Adegoke, Adedoyin Traore, Mamadou K. African Univ Sci & Technol Abuja Nigeria Univ Blaise Pascal CNRS LIMOS UMR 6158 Clermont Ferrand 2 France

ISBN: (纸本)9789077381663

DEVS (Discrete Event System Specification) is a Modeling and simulation methodology that can be used to perform both sequential and distributed simulations. In so doing, it uses the parallel and distributed simulation (PADS) scheme. This paper proposes a methodology which gives a description of performing simulation with DEVS PADS. This is achieved by identifying the components and operations common to works in the area of DEVS PADS. Also by proposing a generic approach for applying DEVS PADS for Modeling and simulation. This generic approach is necessary as it provides a basic foundation for works in DEVS PADS to be built on.

关键词： DEVS parallel and distributed simulation Tree Process Processor

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Energy efficient parallel and distributed simulation

Energy efficient parallel and distributed simulation

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作者： Biswas, Aradhya Georgia Institute of Technology

学位级别：博士

New challenges and opportunities emerge as computing interacts with our surroundings in unprecedented ways. One of these challenges is the energy consumed by computations and communications. In large cloud-based computing systems, it is a major concern because it forms the largest proportion of the environmental and operational costs of data centers. In mobile systems, it directly impacts battery life. This work focuses on understanding and reducing power and energy consumption of the parallel and distributed execution of discrete event simulations, an area not extensively studied in the past. We first empirically characterize the energy consumption of widely used synchronization algorithms. Then a model and techniques are presented and exercised to create energy profile of a distributed simulation system. These demonstrate that distributed execution and synchronization can incur a significant energy and power overhead. To study and optimize the energy required for distributed execution, a property termed zero-energy synchronization is proposed. A zero-energy synchronization algorithm based on an oracle is presented, and a practical implementation is discussed. A more generic synchronization algorithm termed Low Energy YAWNS (LEY) is also proposed. LEY represents the first attempt to design a synchronization algorithm for energy efficiency and, in principle, can achieve zero-energy synchronization for a large class of distributed simulation applications. To employ the energy efficiency of specialized computing hardware platforms, recurrence relations for simulating G/G/1 queueing networks, directly implementable using library primitives, are proposed. In addition to optimizations and scalability they offer, the use of library primitives ease development and open up avenues for adapting the simulation for custom hardware. Composition of parallel prefix scans further improve the energy efficiency of the proposed recurrences and similar sequences of parallel prefix sca

关键词： Energy efficiency parallel computing distributed computing parallel and distributed simulation Discrete event simulation Energy profiling Performance Measurement Synchronization algorithm Dynamic data driven application system Edge computing Middleware Queuing network simulation Data parallel simulation parallel prefix computation

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Private cloud system based on BOINC with support for parallel and distributed simulation

Private cloud system based on BOINC with support for paralle...

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9th IEEE Int. Conf. on Dependable, Autonomic and Secure Comput., DASC 2011, incl. 9th Int. Conf. on Pervasive Intelligence and Computing, PICom 2011, 9th Int. Symp. on Embedded Computing, EmbeddedCom 2011, 1st Int. Conf. on Cloud and Green Comput.CGC

作者： Wu, Yihua Cao, Jian Li, Minglu Shanghai Key Laboratory of Scalable Computing and Systems Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9780769546124

Cloud computing provides an efficient way to expose computing capabilities as sophisticated services that can be accessed remotely. It eliminates the need for organizations to maintain extensive infrastructures. parallel and distributed simulation over cloud will bring us not only the increased productivity and efficiency but also the lower barrier for usage. This paper introduces a private cloud system based on BOINC which supports parallel and distributed simulation. The design idea and implementation method of each component for our system is discussed in detail. © 2011 IEEE.

关键词： BOINC parallel and distributed simulation private cloud parallel Lines design concept Distribute simulating Cloud Computing

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